create a feature layer view with ArcGIS API for Python
Environment: Running ArcGIS API for Python version 2.0.1 from Pro 3.0.2.
I am trying to use the ArcGIS API for Python to create a view of an AGOL hosted feature layer and set a definition query. This guide seems to be the most definitive documentation of the process, but it's not working for me. Here is the code I have that follows this process:
from arcgis import GIS
from arcgis.features import FeatureLayerCollection
source_item_id = '<your item id>'
view_def = {
'viewDefinitionQuery': "State_FIPS IN ('09','23','25','33','44','50')"
}
view_name = 'TEST_create_view_python_01'
gis = GIS(profile='AGOL')
source_item = gis.content.get(source_item_id)
source_flc = FeatureLayerCollection.fromitem(source_item)
new_view = source_flc.manager.create_view(name=view_name)
view_search = gis.content.search(view_name)[0]
view_flc = FeatureLayerCollection.fromitem(view_search)
service_layer = view_flc.layers[0]
service_layer.manager.update_definition(view_def)
I copied the definition query from a view I manually created in a browser, so I'm pretty sure that's correct. It runs without errors or warnings. The new view shows up as an AGOL item, but when I add the view to a webmap, I see this error:
And adding it to a map in Pro gives me this:
Next, I tried one little tweak. After defining the source_flc variable, I create a list of layers and pass that to the create_view function's view_layers parameter. Otherwise, the code is the same:
view_layers = [source_flc.layers[0]]
new_view = source_flc.manager.create_view(name=view_name, view_layers=view_layers)
I can add it to Pro and it renders fine, but the popups are just a regular attribute field display, not my custom popup.I went to edit the popups in my layer and found that the Visualization tab (where you set the popup) is missing!
When I click "Open in Map Viewer", nothing loads.
If I use the "Add" button, the view shows up. If I click the "+Add" button, it changes to an "X Remove" button, but nothing shows up in the layer list or renders on the map.
I can manually create a working view in a web browser. I am getting errors when I try this with other source layers. So this doesn't seem like a data issue. What am I doing wrong?
I ran into a similar issue with the visualization tab and data not appearing when using the ArcGIS Python API to generate a view.
In my case the issue appears to come from a possible bug in the API when a sublayer ID in a Hosted Feature Service does not start with 0, in mine they started counting at 12. When I looked at the API published View Layer's configuration JSON in ArcGIS Assistant, I noticed that the "Data" tab was completely empty, none of the parent service's layer JSON settings carried over as expected:
If I go to the source Hosted Feature Layer and copy and paste its JSON then the layers start to function as expected:
Here is a modified script that adds an extra step of updating the the View's configuration JSON to match the Hosted Feature layer:
from arcgis import GIS
from arcgis.features import FeatureLayerCollection
## access AGOL
agol = GIS("home")
## feature service to make a view for
item = agol.content.get("FS_ITEM_ID")
## Get the Feature service "Data" json settings
source_json_data = item.get_data()
## create a FLC object
flc = FeatureLayerCollection.fromitem(item)
## create the view
view = flc.manager.create_view(name="NAME_OF_VIEW")
## define the definition query
defquery_dict = {
"viewDefinitionQuery" : "SQL_EXPRESSION"
}
## Update the newly published View's "Data" json settings, it appears that "text" is the key to use here
view.update(item_properties={"text":source_json_data})
## get the layer to apply the def query to
## if there is more than one layer use the correct index
lyr = view.layers[0]
## update the definition
print(lyr.manager.update_definition(defquery_dict))Note that this assumes that you are created View Layers on all the original sublayers, this script may have issues if you are only creating a View using a subset of layers.
I am having this same issue, I've tried multiple iterations always come to the same conclusion: a layer view is created but does not function..... I am not python literate by any means, AI is my crutch here.
Empty Data:
What's odd is that the Thumbnail is actually generating the correct image of what would be the filtered data:
If you try and manually update this feature view's definition, you get an error as well.
from arcgis.gis import GIS
from arcgis.features import FeatureLayerCollection
# Connect to AGOL
gis = GIS("HOME")
# Specify the URL of the source feature layer
source_layer_item = gis.content.get("Master_Tracker")
# Check if the item was retrieved successfully
if source_layer_item is None:
raise ValueError(f"Item with ID not found.")
source_layer = FeatureLayerCollection.fromitem(source_layer_item)
# Define the filter (SQL query) for the view layer
filter_query = "PROJECT = 'SaltLake_UT'"
# Create the view layer
view_layer_title = "Salt Lake UT"
view_layer_description = "This is a filtered view layer showing specific data based on the query."
view_layer = source_layer.manager.create_view(
name=view_layer_title,
description=view_layer_description,
preserve_layer_ids=True
)
# Apply the filter to the view layer
view_layer_manager = view_layer.layers[0].manager # Access the manager of the first layer
view_layer_manager.update_definition({
"viewDefinitionQuery": filter_query
})
print(f"Filtered view layer created: {view_layer.url}")
I have some filtered views I've created manually from the same source layer, and i look at their feature server data:
Working View:
Bad View:
Bad JSON:
Any assistance would be appreciated
